How to crop image using yolo format annotation(label)?

import cv2
import glob
from tqdm import tqdm

img_files = glob.glob('/home/admin/darknet/*.png')
save_dir = '/home/admin/Downloads/cropped_img'
for img_file in tqdm(img_files):
    img = cv2.imread(img_file)
    dh, dw, _ = img.shape
    full_path = img_file
    file_name = full_path.split('/')[-1]
    txt_file = open((full_path[:-4] + ".txt"), 'r')

    lines = txt_file.readlines()

    for line in lines:
        
        cls, x_center, y_center, w, h = [float(x.strip()) for x in line.split(' ')]

        if cls == 0:

            x_center, y_center, w, h = float(x_center), float(y_center), float(w), float(h)
            x_center = round(x_center * dw)
            y_center = round(y_center * dh)
            w = round(w * dw)
            h = round(h * dh)
            x = round(x_center - w / 2)
            y = round(y_center - h / 2)

            imgCrop = img[y:y + h, x:x + w]
            cv2.imwrite(f'{save_dir}/{file_name}', imgCrop)
            # cv2.imshow("Crop Image",imgCrop)
            # cv2.waitKey(0)
        else:
            pass